Adjustable lamp



FIG. 1 is a front perspective view of an adjustable lamp showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a side elevational view thereof, the opposite side being a mirror image;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a front elevational view of a second embodiment of my new design;

FIG. 8 is a side elevational view thereof, the opposite side being a mirror image;

FIG. 9 is a rear elevational view thereof;

FIG. 10 is a top plan view thereof; and

FIG. 11 is a bottom plan view thereof. 

The ornamental design for an adjustable lamp, as shown and described. 